According to MMA Fighting, Overeem provided the NSAC with five self-administered tests between June and December that were all clean. Along with those, he faced tests on November 16 and December 21, both of which he passed.

Nate Marquardt defends his Strikeforce welterweight title January 12 against Tarec Saffiedine at Strikeforce’s final event. If victorious, Marquardt told Ariel Helwani he’s open to a unification bout with Georges St. Pierre. Marquardt and St. Pierre have been training together since Marquardt’s first UFC stint. [MMA Fighting]

Strikeforce returns with another female-headlined card as fast-rising women’s star Ronda Rousey defends her Strikeforce bantamweight title against former champion Sarah Kaufman at the Valley View Casino Center in San Diego, California this Saturday night on Showtime.

Other notables on the card include former Strikeforce middleweight champion Ronaldo “Jacare” Souza looking for a second straight win against previously scheduled opponent Derek Brunson. Bouts featuring prospects Lumumba Sayers, Ovince St. Preux and Tarec Saffiedine will also take place.

Here’s a preview of the event’s five-fight main card, which can be seen in its entirety after the jump.

Less than a month since their last venture, Strikeforce kicks off the New Year with another event on Showtime. Saturday night’s main event features upstart Luke Rockhold making the first defense of his Strikeforce middleweight crown against seasoned UFC veteran Keith Jardine.

We will be going live at 3:00 AM EST with live results of DREAM.10, which takes place at the Saitama Super Arena in Saitama, Japan.

The card will be headlined by a lightweight bout between Shinya Aoki and Vitor Riberio. Also on the card is the welterweight tournament semifinals featuring Hayato Sakurai vs. Marius Zaromskis and Andre Galvao vs. Jason High.

Feel free to leave your thoughts and comments throughout the evening. Detailed live results are after the jump.